diff -r b2d91fd5d926 -r 313aad7435a8 blackbox/Makefile
--- a/blackbox/Makefile	Sun Dec 02 13:24:42 2012 +0100
+++ b/blackbox/Makefile	Sun Dec 02 18:03:06 2012 +0100
@@ -18,6 +18,11 @@
 PORT=/dev/ttyS0
 endif
 
+PROGRAMMER=-P $(PORT) -c stk500v2
+ifdef IF
+PROGRAMMER=-c $(IF)
+endif
+
 #SRC = main.c seriald.c driver/ADC.c driver/clock.c driver/timer.c
 #SRC = main.c driver/rs232.c driver/manchester.c
 SRC = main.c driver/rs232.c driver/adc.c
@@ -79,13 +84,13 @@
 	rm $(PRG).map
 
 program: code
-	$(AVRDUDE) -P $(PORT) -c stk500v2 -b $(ISP_BAUD) -i 1 -p $(MCU) -V -U flash:w:$(PRG).hex:i
+	$(AVRDUDE) $(PROGRAMMER) -b $(ISP_BAUD) -i 1 -p $(MCU) -V -U flash:w:$(PRG).hex:i
 
 backup:
-	$(AVRDUDE) -P $(PORT) -c stk500v2 -b $(ISP_BAUD) -i 1 -p $(MCU) -V -U flash:r:$(PRG)_backup.hex:i
+	$(AVRDUDE) $(PROGRAMMER) -b $(ISP_BAUD) -i 1 -p $(MCU) -V -U flash:r:$(PRG)_backup.hex:i
 
 fuse:
-	$(AVRDUDE) -P $(PORT) -c stk500v2 -p $(MCU) -V $(FUSES)
+	$(AVRDUDE) -c $(PROGRAMMER) -p $(MCU) -V $(FUSES)
 
 clean:
 	rm -rf *.o *.elf *.elf.src *.s *.i